Thermostatic damper control



March 29, 1927. I ,622,973

8. F. RICHARDS THERMOS TATIC DAMPER CONTROL Filed Nov 22, 1.926

lflllll III II 6 INVENTOR Patented Mar. 29, 1927.

SAMUEL F. RICHARDS, OF PITTSBURGH, PENIFISYLVANI'A.

JTHERMOSTATIC DAMPER CONTROL,

Application filed November 22, 1926. SeriarNo. 149. 325.

*The invention relates toa damper con- -'trolling device tor a hot water heater. The device 1s connected to the riser leading: upward trom the heatertothe radiators, and

the water trom'this riser acting upon a thern'lostatic Cl-QVICQ ot the disc type moves alever to which the damper otthe'heater is connected. The invention hasft'or its objects the provision of an improved device of the character specified wherein, a very direet and positive control ot the thermostat from the water of the riser is secured, and more specifically, the provision ot a simple and eltective means for securing a circulation of water from the riser around the chamber containing the expansible thermostat'discs, whereby the device will respond quickly to changes in ten'iperature in the water. One embodiment of the invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a vertical section throughthe device and the riser to which it is connected. And Fig. 2 is a section on the line IIII of Fig. 1.

Referring to the drawings, 1 is a T in the riser 2 leading upward from the heater to the radiators, and 3 is an upright casing having the cavity or chamber 4; therein. Integral with this is a second casing 5 having the cavities 5 and 6, 6 surrounding the lower end ot the chamber 4. The cavity 5 is separated "from the two cavities 6, 6 lying thereabove by means of the partitions 7, 7. These partitions merge at their inner end into the plate or flange 8, which projects out into the riser. and curves downwardly, as indicated in Fig. 1.

Lying in the chamber 4 is the plunger 9 and the series of expansible sheet metal discs 10. These discs are well known in the art, consisting of thin sheet metal containing a liquid having a low vaporizing point, such as acetone. The plunger 9 has an upwardly extending stem 11, projecting through the cap 12 and engaging the lever 13, which has suitable connections (not shown) with the damper ot the heater. The lever is shown as pivoted between a pair of lugs 14: carried by the cap, and is guided between another pair ot lugs 15, also carried by the cap. A plug 16 is provided as a closure for the clean out opening in the side wall of the casing.

In operation, the water in the riser, which is moving upward strikes the flange 8 and is deflectedinwardlythrough the cavity 5, turning upwarchs as lIltlICZltBCb by the arrow,

at the end of such cavity end :fiowing-back to the riserthroi 'h the cavities 6. Due to this circulation, any changes of temperature in the riser are quicklycommunicated to the shell-:o't metal constituting the lower end ot the cluin'rber land carrying the discs 10,

and this shellin turn aiiects'the expansion "discs.

\Vith rising te1nperatures,-the eX- pansion of the discs moves the lever 12 upward and cause a closure, or partial closure, of the damper, while a reverse result occurs with decreasing teniperatures.

The arrangement of the flange 8 projecting into the riser, in conjunction with the arrangement of the cavities 5 and 6, 6 in sures a circulation of water past the thermostatic controlling means, and this in turn causes the device to respond promptly to changes in the ten'iperature of the water.

I'Vhat I claim is:

1. In combination in a temperature controlling device for use with an upright hot water pipe through which a circulation of water is provided, a casing having a tubular connection leading into said pipe, a laterally extending partition in the casing eX- tending through said connection and projecting into the pipe, an upright casing integral with the first casing and having its lower end extending down into said first casing past said partition, expansible thermostatic means and a plunger mounted in said upright casing, and a connnunication between the outer ends of the cavities in said first casing lying above and below said partition.

2. In combination in a teniperature controlling device for use with an upright hot water pipe through which a circulation of water is provided, a casing having a tubular connection leading into said pipe, a laterally extending partition in the casing extending through said connection and projecting into the pipe, an upright casing integral with the first casing and having its lower end extending down into said first casing past said partition, eXpansible thermostatic means and a plunger mounted in said upright casing, and a communication between the outer ends o'i the cavities in said first casing lying above and below said partition, the end of said partition which extends into said pipe being turned downwardly.

3. In combination with the vertical riser of a hotwater system, a vertical easing adjacent the side of the riser provided with expansible thermostatic means and a plunger operated thereby, another easing surrounding the lower end of the vertical easing with its bottom and side walls spaced away from the bottom and. side walls of the first easing, a tubular eon neetion leading from the side of said other easing into the riser, and a horizontal partition in said other asing, extend ing at one end through said connection to the riser and at the other end stopping short of the end wall or? said other easing so that aeonnniniea is left between the cavities above and below sait partition.

l. In eoml'ination with the vertical riser oiii a hot water system, a vertical easing adjacent the side or the riser provided with expansible thermostatic means and a plunger operated thereby, another easing surrounding the lower end of the \erti -al casing with its bottom and side walls spaced away from the bottom and side walls of the first :asingr, a tubular connection leading from the side of said other easing into the riser, and a horizontal partition in said other easing, extending at one end through said eonneetion to t. e riser and at the other end shipping short '5 the end wall of said other easing, so that a eoinn'innieation is left between the cavities above and below said partition, the aid end of the partition which projects into the riser being); turned downwardly.

In testimony whereof, I have hereunto subscribed my name this 20th day of November 192G.

SAMUEL F. RICHARDS. 

